Resilient wheel



July 3, 1923.

E.SCHULTZ RESILIENT WHEEL Filed DSG. 21 1920 2 Sheets-Sheet 1 July '3, 1923.

E. scHuL-'rz RES IDI ENT WHEEL Filed Dec. 21 1920 2 Sheets-SheetI 2 Patented July 3, 1923.

UNITEDI 'STATES ATE NT :ofrfzsificE-l Q ERNEsrscHULTaor EASTMELBOURNE-VICTORIA, vausanmartin.

i RESILIENT "Application:iledDecember 21, 1920; Seria1`Nlo. 432,284. l

'To fill whom imag/concern y Be 1t known that"ERNnsTSc11ULTz,af'citizen of the .Gommonweailth of Australia,

' and resident of I1211 Grey Street, iEast Mel# 5 bourne, ini'th'e State `offVictoria, lCommoniwealth of l Australia; has invented" a' certain z new -f arid :useful Vimprovement inv and `1RelatingtodResi'lient:Wheels-Lof: whichthe fol- The resili t wheels yat presentfinusel are "defective particularly fo'rthe "reason that the damping of *shocks `A when 1 received *is f A Avided'for"c listiibu'ting theY shock simultaneously aroun'dfv y'the periphery =o1tff`the wheelaand v"furthermore great f'diiiicult'y f` has "been eX- periencedf- 'in linking lup'- vlthe' vparts to provide a practical torque orfbrakin'g effect. "This 'inventionlfiasbeen devised in order l to' overcome existing-detects and to provide in 'a' mechanically lresilient tyre, cheap,` 'simple-and A'eiltective'meanswhichY will not only Ysimultaneou'sly4 distribute Yor "dampt-he -shock around the'peripher f"the-wheel but which will provide-:forisi cient torque loribr aking ffeii'ect;V e 1 e The' invention consists?` in" 'the' provision of airv pressure means-.adapted to'exertI outward *pressure*aga-instlconcave surfacesAr` on wheel Lrim v:members and alsof againstl corresponding concave'V surfaces'- v`on ""the 'tread ring of a *the iwheelfwhichis spaced *concentrically "from and. outside'l'they rim, Lthe pressure means being so Vdisposed that'ShOGkfre- 40' lbounds are taken simultaneously around the wheel, and Y' the j pressure being 1 maintained outwardlyfromtheswheel centre, the wheel is maintained in practicalfcon'centrlcity.

In order that theilpr'actical application of ift the invention may be morefreadily understood it will now be described with reference to the accompanying drawings in which Figure 1 is a view in vertical central section of the improved resilient wheel.

Figure 2 is a view in transverse section of a rtion of Figure 1.

igure 3 is a view in vertical section of an alternative arrangement to Figure l,

latestolan'iimp'roved ree Figure l is tiall feature.

azsectional 'view of an' essen- In the construction illustrated; in Figures l Y.

is: provided' 'having discs 17 mounted' there on l on either side, f the 1 outer edges being spaced` from each otherand Abeingbent inwardly in themannerof ledges 18jtolform 1rims which f' are provided 'withf "serrated for undulating lsurfaces 19. Preferablyjthe-contact 'surfaces 19 of the Vrims `are' `formed"` of fibre orV other 'suitable vpackingrings'i 20.'v

Cylinders 21'and pist'ons22 are mounted` i so? that they `remain I,in-1a lfloat-ing condition, the cylinders 121Y connecting@ with ia ',leXible ring or band 23 spaced from and surround- Y"ing the `wheclbutt and 1 which p-rovidesa floating tie-'ring for the said'icylinders,

-0utsidevthe rim 18'-a"trea`d`ring1s2l-'w-ith rims18`t`o allow of resilient movement. The

the tread ring24, and` distancedfoutwardly from the serrations`19xlon,therimrings 20,

are further seriations 27 corresponding to 4of course, nearer the -whelc'entre *Inforder that A the serrations `or' undulating surfaces `27 of ythe tread ring 211 contactwith -the pistons 22'each piston :22 atthecentre and atfthe outerend is extended fasatv "28 inside the'rings-26 of the tread'fsothatlthe ar rubber or other tread `25-ismounted and thetrea'd ring 24', is suitably spaced ron'ithe j those on the rini 'rings-20, the'latter?being the'points`29 are always* in contact= with the serrations'l-Q'fon thefrirn rings 2O.` Y. l

A'fexible cylindertie band I23'-o'f\-suitable shape, spaced :rom the hub '16,' isi provided,

the 7disc` rims1 20V` and tread y ring 1241 ar'ersuitablypositioned'-and` spaced, andthe required Y numberV of piston Yand cylinder lspokes V@are Each cylinder 21 and piston 22 therefore preferably consists of telescoping tubes closed at the outer ends, the piston or outer member 22 being adapted to slide within the cylinder 21.

In order to ensure the rapid transmission of air through the cylinders and thus around the wheel on any shock the cylinders have free air communication with each other, the means employed in Figure 2 consisting in the mounting of a tubular pipe 32 between the hub 16 and the flexible floating tie ring 23 andeach of the cylinders communicate with the tube 32 through the by-passes 33 and joint connections 34, while a valve nipple 35 may be provided in the pipe 32 to pump a preliminary air pressure into the cylinders if so desired.

In the modification illustrated in Figure 3, the inner ends of the cylinders 21 are formed integral with an inner ring 30 and in this ring 30 are passages 41 which allow of air communication between the cylinders 21 around the wheel while an air inlet valve 39 in a valve chamber 37 and normally held closed on its seat 40 by a spring 38 is also provided.

The side rim plates 17 are effectively held in position by the bolts 42 which are provided with lock nuts' 43. In order that the normal load may be carried without utilizing the air pressure helical springs 44 (Figure 1) of sufficient strength may be mounted in the cylinders 21 and positioned so that they bear outwardly on the pistons, so that when a shock is imparted the springs and cylinders operate to perform the function herein described. 1

In operation the pistons 22 being normally extended the cylinders 21 are filled with air, and the normal load is taken but when extra weight is imparted or shocks taken the cylinders'21 affected impart increased pressure owing to the retention valve 39 being held against its seat and the shocks are thus simultaneously taken on air cushions around the periphery of the wheel, the shock being distributed through the cylinders 21 until it is damped, the outward movement of some of the pistons drawing in more air which is also simultaneously transmitted to the other cylinders and thus the return of the wheel to practical concentricity is assured.

By the above construction, thepressure of the pistons 22 is always exerted outwardly against and around the tread ring 24 and shocks when imparted are transmitted to and against the air cushions in the cylinders 21 around the periphery of the wheel and clear of the Wheel centre 16.

I desire it to be understood that various modifications or improvements may be embodied 'Without departing from the spirit and scope of the invention, the particular characteristic being the utilization of a continuous air container bearing outwardly against the rim and tread to cause the simultaneous displacement of air around the wheel on centrifugal motion or on shocks being imparted thereto.

What I claim as my invention and desire vto secure by Letters Patent is 1. A resilient wheel comprising, in compistons operating in saidcylinders and bear-1- ing against concave surfaces formed around the inner periphery of a ring fitted with a tread and also bearing against concave surfaces on rim rings formed on plates bolted ltogether and spaced from each other and connected to the vhub there being a space between the tread ring and the rim rings for the purposes specified.

2. A resilient wheel comprising, incombination a concave surface formed on the inner surface of a ring supporting a tread, sleeve pistons having central extensions for operating against the tread surface, the pistons on each side being also arranged to operate against inner concave surfaces of rim rings said rim rings being supported by rigid side plates connected to the. wheel hub, radial air cylinders receiving the pistons and disposed around a ring spaced from the hub, said cylinders providing an evenly distributed air pressure to the pistons around the wheel, and means for admitting air into the cylinders whereby to attain the required pressure, for the purposes specied. y l Signed at Melbourne, Victoria, Australia, this 18th day of November 1920.

ERNEST SCHUIIZ.Y In the presence of SIDNEY HENDLEY,

A. EDWARDS. 

